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Ubuntu 16.04 LTS USN-3161-4 Moderate: Linux Kernel Local Threats

ubuntu
Calendar Grey December 20, 2016
Scroller Ubuntu
Numerous vulnerabilities within the core kernel have been resolved, encompassing TTY management, v4l2 interactions, and additional concerns in Ubuntu 16.04.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-snapdragon: Linux kernel for Snapdragon Processors

Details:

Tilman Schmidt and Sasha Levin discovered a use-after-free condition in the

TTY implementation in the Linux kernel. A local attacker could use this to

expose sensitive information (kernel memory). (CVE-2015-8964)

It was discovered that the Video For Linux Two (v4l2) implementation in the

Linux kernel did not properly handle multiple planes when processing a

VIDIOC_DQBUF ioctl(). A local attacker could use this to cause a denial of

service (system crash) or possibly execute arbitrary code. (CVE-2016-4568)

CAI Qian discovered that shared bind mounts in a mount namespace

exponentially added entries without restriction to the Linux kernel's mount

table. A local attacker could use this to cause a denial of service (system

crash). (CVE-2016-6213)

Andreas Gruenbacher and Jan Kara discovered that the filesystem

implementation in the Linux kernel d...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory moderate local threats system crash linux-snapdragon

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1042-snapdragon  4.4.0-1042.46
  linux-image-snapdragon          4.4.0.1042.34

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

https://ubuntu.com/security/notices/USN-3161-4

https://ubuntu.com/security/notices/USN-3161-1

CVE-2015-8964, CVE-2016-4568, CVE-2016-6213, CVE-2016-7097,

CVE-2016-7425, CVE-2016-8630, CVE-2016-8633, CVE-2016-8645,

CVE-2016-8658, CVE-2016-9555, CVE-2016-9644

Severity
important
Lowest
Low
Medium
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Critical

December 20, 2016

Topics%20covered

Topics Covered

security advisory moderate local threats system crash linux-snapdragon

Package Information

https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1042.46

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